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<html>
	<head>
		<meta charset="utf-8">
		<title></title>
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	<body>
		<script type="text/javascript">
			var i = "Hello_word!!";
			
			document.write(i.length+"<br />");
			document.write(i.substr(2,8)+"<br />");
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			document.write(i.indexOf("l")+"<br />");
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